BioScience Dictionary

 
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Ot.

Found Sediment 10 times.

Displaying results 1 to 10.

1. Sediment
* Material carried and deposited by water. * Fragments of rock, soil and organic material transported and deposited in beds by wind, water or other natural phenomena. The term can refer to any size of particles but is often used to indicate only fragments smaller than 6 mm.

2. Sediment discharge
The mass or volume of sediment (usually mass) passing a stream transect in a unit of time. The term may be qualified, for example, as suspended-sediment discharge, bedload discharge, or total-sediment discharge, usually expressed as tons per day.

3. Sediment load
The portion of the total sediment load that moves in suspension, free from contact with the streambed, and is made up of particles having such density or grain size as to permit movement disassociated from the streambed. Density and grain size vary according to the amount of turbulence.

4. Sediment loading
The total sediment in a stream system, whether in suspension (suspended load) or on the bottom (bed load).

5. Sediment wedge
Thick, wedge-shaped deposit of mixed soil, rock and organic debris injected into a stream channel by debris avalanches and debris flows from adjacent hill slopes.

6. Sediment
Loose aggregate of solids derived from preexisting rocks, or solids precipitated from solution by inorganic chemical processes or extracted from solution by organisms.

7. Sedimentary rock
Any rock composed of sediment, i.e., solid particles and dissolved minerals. Examples include rocks that form from sand or mud in riverbeds or on the sea bottom.

8. Sedimentation
* Gravitational deposit of transported material in flowing or standing water. * Deposition of material suspended in a stream system, whether in suspension (suspended load) or on the bottom (bed load).

9. Sedimentation
* The process where particles suspended in solution settle out of the solution and to the bottom of the container. This can occur by gravity alone, or by centrifugation (high-speed spinning). * A sedimentological (geological) term for the settling of particles suspended in moving water into layers over time in the same location to form sedimentary deposits.

10. Sedimentation dam
A dam which is designed to collect sediment from the water flowing over or through it, thereby filling in a portion of a streambed or gully.

View web definitions »

Learn more about Sediment »